直接样品燃烧-红外光谱法测定镁碳砖中总碳量  

Direct Sample Combustion-IRS Determination of Total Carbon in Carbon-Magnesite Bricks

作　　者：周强 年季强 朱春要 陆娜萍 

机构地区：[1]江苏省沙钢钢铁研究院分析测试中心,张家港215625

出　　处：《理化检验（化学分册）》2013年第5期563-565,569,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：应用高频感应炉直接燃烧样品-红外光谱法测定了高碳镁砖中总碳量。一定量样品(0.150 0g)用碳、硫含量很低的纯铁(1.0g),锡粒(0.30g)及钨粒(1.0g)作为助熔剂,用高纯氧化镁与高纯石墨粉混合制备了模拟标准样品,测得含碳量(w%)在5%～30%之间呈线性关系。按所提出方法分析了3个已知样品,进行了方法的精密度试验,测得结果的相对标准偏差(n=10)在0.25%～0.65%之间。将此方法用于测定1个标准样品和3种基准物质(碳酸钠、碳酸钙和草酸钠)中的总碳量,测定值与标准值之间的绝对误差在0.008%～0.07%之间。Infrared Spectrometry with direct sample combustion by high frequency induction furnace was applied to the determination of total carbon in carbon-magnesite bricks. A definite amount of the sample （0. 150 0 g） was taken and 1.0 g of pure iron, 0. 30 g of tin granules and 1.0 g of tungsten granules of low carbon and sulfur content were used as fluxes. Simulated standard samples prepared by mixing difinite amount of pure MgO with high- purity graphite powder giving linear relationship in the range of （w%） 5%- 30% of carbon, were used for calibration. Preeision test was performed by analyzing 3 known samples giving values of RSD＇s （n= 10） ranged from 0. 25% to 0. 65%. The proposed method was used in analysis of a standard sample and 3 primary materials （sodium carbonate, calcium carbonate and sodium oxalate）, absolute errors of results of carbon contents of these samples found were in the range of 0. 008%-0. 07%.

关 键 词：红外光谱法 碳量 直接样品燃烧 高频感应炉 模拟标准样品 镁碳砖 

分 类 号：O657.33[理学—分析化学]